Rock Tomb won't kill anything ever and even after the speed drop I don't wager Throh could outspeed so I discounted that. Rock Slide I was a bit more iffy about, but I figured that Unfezant has a chance of surviving and KOing Sawk due to Rock Slides only OK BP if it's at full health. Not recommended and it definitely won't beat Conkeldurr disregarding crits, but hey, better than relying on Signal Beam against 3 pretty bulky and hard hitting Psychic types. I'm fine with Pidove for Low either way, to be honest I'd rather shift the discussion onto stuff which hasn't been mentioned yet.And Rock Tomb on Throh. And Sturdy+Rock Slide on Sawk. Are you going to chance it on misses?